docs: def from_web(network_id: int, host: Optional[str] = None) -> BELGraph:
      """Retrieve a public network from BEL Commons.
  
      In the future, this function may be extended to support authentication.
  
      :param int network_id: The BEL Commons network identifier
      :param Optional[str] host: The location of the BEL Commons server. Alternatively, looks up in PyBEL config with
       ``PYBEL_REMOTE_HOST`` or the environment as ``PYBEL_REMOTE_HOST`` Defaults to
       :data:`pybel.constants.DEFAULT_SERVICE_URL`
      :rtype: pybel.BELGraph
      """
      if host is None:
          host = _get_host()
  
      url = host + GET_ENDPOINT.format(network_id)
      res = requests.get(url)
      graph_json = res.json()
      graph = from_json(graph_json)
      return graph